Sony's AN820A/9LL Wireless Active Omni-Directional Antenna provides a gain of 10 dB. It supports various mounting configurations (wall, mic stand, etc.). Two of these antennas are required for diversity tuner operation. This antenna is for use with UHF-TV channels 14 through 25. For use with UHF-TV channels 14 to 25, 470 to 542 MHz Receives 9 VDC power from receiver Adds 10 dB of gain Compensates for cable loss/working distance Wall or stand mountable LED power indicator.